/* DeepNote 販売サイト 共通スタイル */
:root{
  --ink:#0d0f1a;
  --ink-2:#3d4257;
  --muted:#6b7186;
  --line:#e6e8f0;
  --brand:#3b4ee0;
  --brand-2:#7a4ce0;
  --brand-3:#b04ae0;
  --grad:linear-gradient(110deg,#2a2f8f 0%,#4b3fd1 38%,#7a3fd1 68%,#a83fc9 100%);
  --radius:14px;
  --maxw:1080px;
  --font:"Noto Sans JP","Hiragino Kaku Gothic ProN","Hiragino Sans",Meiryo,system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
/* display 指定を持つ要素にも hidden を効かせる */
[hidden]{display:none !important}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:#fff;line-height:1.9;
  font-feature-settings:"palt" 1;letter-spacing:.02em}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-underline-offset:3px}
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:20px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);
  backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;gap:16px;height:64px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:19px;
  letter-spacing:.01em;color:var(--ink);text-decoration:none}
/* ロゴマーク：SVG を CSS マスクとして使い、color で白黒を切り替える */
.logo-mark{width:30px;height:30px;flex:none;display:block;color:var(--ink);
  background:currentColor;
  -webkit-mask:url(/assets/logo.svg) center/contain no-repeat;
          mask:url(/assets/logo.svg) center/contain no-repeat}
.site-footer .logo-mark{color:#fff}
.gnav{margin-left:auto;display:flex;align-items:center;gap:26px}
.gnav a{color:var(--ink-2);text-decoration:none;font-size:14px;font-weight:600}
.gnav a:hover{color:var(--brand)}
.gnav .nav-cta{padding:9px 20px;border-radius:999px;background:var(--grad);color:#fff}
@media(max-width:860px){.gnav{gap:14px}.gnav .nav-hide{display:none}}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--grad);color:#fff;overflow:hidden;
  padding:96px 0 104px;text-align:center}
.hero::after{content:"";position:absolute;inset:auto -10% -55% -10%;height:60%;
  background:radial-gradient(60% 100% at 50% 0,rgba(255,255,255,.22),transparent 70%)}
.hero .wrap{position:relative;z-index:1}
.badges{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-bottom:26px}
.badge{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;
  width:116px;height:116px;border-radius:50%;border:1px solid rgba(255,255,255,.45);
  background:rgba(255,255,255,.1);font-size:12px;line-height:1.5}
.badge strong{font-size:19px;font-weight:800;letter-spacing:.02em}
.hero h1{font-size:clamp(28px,5.2vw,50px);line-height:1.35;font-weight:800;margin:0 0 20px}
.hero p{font-size:clamp(14px,2.2vw,17px);color:rgba(255,255,255,.9);margin:0 auto 34px;max-width:36em}
.hero-price{display:inline-flex;align-items:baseline;gap:6px;margin-bottom:30px;
  padding:10px 24px;border-radius:999px;background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.35);font-size:14px}
.hero-price b{font-size:30px;font-weight:800;letter-spacing:.01em}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-width:280px;padding:17px 30px;border:0;border-radius:999px;cursor:pointer;
  font-family:inherit;font-size:16px;font-weight:700;letter-spacing:.02em;
  color:#fff;background:var(--grad);text-decoration:none;
  box-shadow:0 10px 26px rgba(74,62,190,.32);transition:transform .15s,box-shadow .15s,opacity .15s}
.btn:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(74,62,190,.4)}
.btn:active{transform:translateY(0)}
.btn::after{content:"→";font-weight:700}
.btn-ghost{background:#fff;color:var(--brand);border:1.5px solid var(--brand);box-shadow:none}
.btn-ghost:hover{box-shadow:0 8px 20px rgba(59,78,224,.16)}
.btn-white{background:#fff;color:var(--brand);box-shadow:0 10px 26px rgba(0,0,0,.18)}
.btn-danger{background:#fff;color:#c3223c;border:1.5px solid #c3223c;box-shadow:none}
.btn-danger:hover{background:#c3223c;color:#fff}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.btn-row{display:flex;flex-direction:column;align-items:center;gap:14px}
.btn-row form{margin:0}
.btn-row p{margin:0}
@media(max-width:480px){.btn{min-width:0;width:100%}.btn-row form{width:100%}}

/* ---------- sections ---------- */
section{padding:88px 0}
.sec-label{display:block;font-size:13px;font-weight:700;color:var(--brand);
  letter-spacing:.14em;text-transform:uppercase;margin-bottom:10px}
h2{font-size:clamp(24px,3.6vw,36px);font-weight:800;line-height:1.45;margin:0 0 20px}
h3{font-size:clamp(18px,2.6vw,22px);font-weight:700;line-height:1.55;margin:0 0 12px}
.lead{font-size:16px;color:var(--ink-2);margin:0 0 8px}
.sec-center{text-align:center}
.sec-center .lead{max-width:40em;margin-inline:auto}
.sec-alt{background:#f6f7fb}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:44px}
@media(max-width:860px){.cards{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;box-shadow:0 2px 14px rgba(20,24,60,.05)}
.card .ico{width:44px;height:44px;border-radius:12px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px;margin-bottom:16px}
.card h3{font-size:18px;margin-bottom:8px}
.card p{margin:0;font-size:14.5px;color:var(--ink-2)}

/* ---------- purchase ---------- */
.buy{background:#f6f7fb;border-top:1px solid var(--line)}
.buy-box{background:#fff;border:1px solid var(--line);border-radius:20px;
  padding:44px 36px;box-shadow:0 6px 30px rgba(20,24,60,.07);text-align:center}
@media(max-width:600px){.buy-box{padding:30px 20px}}
.price-tag{display:inline-flex;align-items:baseline;gap:6px;margin:6px 0 22px;
  font-size:15px;color:var(--ink-2)}
.price-tag b{font-size:44px;font-weight:800;line-height:1;color:var(--ink);letter-spacing:-.01em}
.agree{display:flex;align-items:flex-start;gap:10px;justify-content:center;
  text-align:left;max-width:34em;margin:0 auto 22px;font-size:14px;color:var(--ink-2)}
.agree input{margin-top:6px;width:18px;height:18px;accent-color:var(--brand);flex:none}
.notes{margin:26px auto 0;max-width:46em;text-align:left;font-size:13px;color:var(--muted);
  padding-left:1.2em}
.notes li{margin-bottom:6px}

/* ---------- notice / callout ---------- */
.callout{border:1px solid var(--line);border-left:4px solid var(--brand);
  background:#f6f7fb;border-radius:10px;padding:22px 24px;margin:26px 0}
.callout.warn{border-left-color:#c3223c;background:#fdf4f5}
.callout h3{font-size:16px;margin-bottom:8px}
.callout ul{margin:0;padding-left:1.2em;font-size:14.5px;color:var(--ink-2)}
.callout li{margin-bottom:6px}

/* ---------- faq ---------- */
.faq{max-width:760px;margin:40px auto 0}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;padding:20px 34px 20px 0;position:relative;
  font-weight:700;font-size:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:6px;top:18px;font-size:22px;
  color:var(--brand);transition:transform .2s}
.faq details[open] summary::after{content:"−"}
.faq .ans{padding:0 0 20px;font-size:14.5px;color:var(--ink-2)}

/* ---------- page head (下層ページ) ---------- */
.page-head{background:var(--grad);color:#fff;padding:60px 0 56px;text-align:center}
.page-head h1{font-size:clamp(24px,4vw,36px);font-weight:800;margin:0 0 10px}
.page-head p{margin:0;color:rgba(255,255,255,.88);font-size:15px}

/* ---------- article ---------- */
.article{padding:64px 0 88px}
.article h2{font-size:22px;margin-top:40px;padding-bottom:10px;border-bottom:2px solid var(--line)}
.article h2:first-child{margin-top:0}
.article p,.article li{font-size:15px;color:var(--ink-2)}
.article table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px}
.article th,.article td{border:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top}
.article th{background:#f6f7fb;font-weight:700;white-space:nowrap;width:12em;color:var(--ink)}
@media(max-width:600px){.article th{width:auto;white-space:normal}}

/* ---------- result (完了系) ---------- */
.result{text-align:center;padding:90px 0}
.result .mark{width:80px;height:80px;margin:0 auto 24px;border-radius:50%;
  background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:38px}
.result .mark.gray{background:#9aa0b4}

/* ---------- footer ---------- */
.site-footer{background:#12142a;color:#b9bdd0;padding:54px 0 40px;font-size:13.5px}
.site-footer .logo{color:#fff}
.fnav{display:flex;flex-wrap:wrap;gap:12px 26px;margin:24px 0 26px}
.fnav a{color:#b9bdd0;text-decoration:none}
.fnav a:hover{color:#fff;text-decoration:underline}
.site-footer .contact{margin:0 0 6px}
.site-footer .contact a{color:#fff}
.copyright{border-top:1px solid rgba(255,255,255,.14);padding-top:20px;margin-top:8px;
  color:#8990a8;font-size:12.5px}
.env-note{display:inline-block;margin-top:10px;padding:3px 10px;border-radius:999px;
  background:rgba(255,255,255,.1);font-size:11.5px;color:#d5d8e6}

@media(max-width:520px){
  .hero{padding:64px 0 76px}
  .hero-price{flex-wrap:wrap;justify-content:center;padding:12px 20px;font-size:13px}
  .hero-price b{font-size:26px}
  .badge{width:98px;height:98px;font-size:11px}
  .badge strong{font-size:16px}
  section{padding:60px 0}
}